Water tank

Abstract

The embodiment of the utility model provides a water tank. The water tank comprises a tank body, a liquid inlet pipe, a first control valve, a pressure relief pipe and a pressure relief valve. The liquid inlet pipe is communicated with the box body, and the liquid inlet pipe is configured to introduce liquid into the box body; the first control valve is arranged on the liquid inlet pipe; one end of the pressure relief pipe is communicated with the liquid inlet pipe, and the other end of the pressure relief pipe is communicated with the box body; the pressure relief valve is arranged on the pressure relief pipe and comprises a first pressure relief assembly and a second pressure relief assembly, and a first pressure relief cavity is formed between the first pressure relief assembly and the second pressure relief assembly; a plurality of pressure relief holes are evenly formed in the first pressure relief assembly and communicate with the liquid inlet pipe and the first pressure relief cavity. A second pressure relief cavity is formed in the second pressure relief assembly, a movable part is arranged in the second pressure relief cavity, and the movable part is configured to reciprocate in the second pressure relief cavity in the liquid flowing direction; when the first control valve is in a closed state, liquid in the liquid inlet pipe can sequentially pass through the first pressure relief cavity and the second pressure relief cavity to enter the box body so as to reduce the pressure in the liquid inlet pipe.

Description

Technical Field

[0001] This application relates to the technical field of water supply and drainage, and particularly to a water tank. Background Art

[0002] In a water supply and drainage system, to meet the needs of domestic water use, a water tank or a water pool for domestic water is configured. Usually, a liquid inlet pipe provided with a control valve is used to fill water into the water tank or the water pool so that the water tank or the water pool reaches the required liquid level.

[0003] In the related art, when the water flow velocity in the liquid inlet pipe is relatively high, it will cause the pressure in the liquid inlet pipe to be too high, and thus the water hammer effect is very likely to occur.

[0004] However, the occurrence of the water hammer effect will cause the pressure borne by the liquid inlet pipe to greatly exceed the designed pressure resistance level, and then cause the interface of the liquid inlet pipe to leak, and even cause the liquid inlet pipe to burst. Utility Model Content

[0005] The embodiments of this application provide a water tank to solve the technical problem in the related art that when the water flow velocity in the liquid inlet pipe is too high, the water hammer effect occurs, resulting in the pressure borne by the liquid inlet pipe greatly exceeding the designed pressure resistance level, and then causing the interface of the liquid inlet pipe to leak, and even causing the liquid inlet pipe to burst.

[0006] The embodiments of this application provide a water tank, including: a box body, a liquid inlet pipe, a first control valve, a pressure relief pipe and a pressure relief valve;

[0007] The liquid inlet pipe is communicated with the box body, and the liquid inlet pipe is configured to introduce liquid into the box body;

[0008] The first control valve is arranged on the liquid inlet pipe, and the first control valve has a closed state to control the liquid in the liquid inlet pipe to stop flowing into the box body;

[0009] One end of the pressure relief pipe is communicated with the liquid inlet pipe, and the other end of the pressure relief pipe is communicated with the box body;

[0010] The pressure relief valve is arranged on the pressure relief pipe. The pressure relief valve includes a first pressure relief component and a second pressure relief component, and a first pressure relief cavity is formed between the first pressure relief component and the second pressure relief component;

[0011] A plurality of pressure relief holes are uniformly arranged on the first pressure relief component, and the plurality of pressure relief holes communicate the liquid inlet pipe and the first pressure relief cavity;

[0012] The second pressure relief component forms a second pressure relief cavity, and a movable part is arranged in the second pressure relief cavity. The movable part is configured to reciprocate in the second pressure relief cavity along the liquid flow direction to close or communicate the first pressure relief cavity and the second pressure relief cavity;

[0013] When the first control valve is in the closed state, the liquid in the liquid inlet pipe can sequentially enter the box body through the first pressure relief cavity and the second pressure relief cavity to reduce the pressure in the liquid inlet pipe.

[0014] In a feasible implementation, the movable member includes a movable block and an elastic member. One end of the elastic member is disposed at one end of the movable block, and the other end of the elastic member is disposed on the end wall of the second pressure relief chamber facing away from the first pressure relief chamber.

[0015] In a feasible implementation, the inner diameter of the second pressure relief chamber gradually increases from the direction of the first pressure relief chamber to the direction of the second pressure relief chamber.

[0016] In a feasible implementation, the water tank further includes a first maintenance valve and a second maintenance valve. The first maintenance valve is disposed on the liquid inlet pipe, and the second maintenance valve is disposed on the pressure relief pipe.

[0017] In a feasible implementation, the water tank further includes a liquid storage portion. The liquid storage portion forms a liquid storage cavity. The liquid storage cavity is communicated with the pressure relief pipe through a first connecting pipe, and the liquid storage cavity is communicated with the box body through a second connecting pipe. Wherein, the first connecting pipe is disposed between the connecting end of the pressure relief pipe and the liquid inlet pipe and the liquid inlet end of the pressure relief valve.

[0018] In a feasible implementation, a second control valve is disposed on the first connecting pipe. The second control valve is used to control the liquid in the pressure relief pipe to flow into the liquid storage cavity.

[0019] A third control valve is disposed on the second connecting pipe. The third control valve is used to control the liquid in the liquid storage cavity to flow into the box body through the second connecting pipe.

[0020] The embodiment of the present application provides a water tank. In the present application, through the arrangement of the liquid inlet pipe, liquid can be introduced into the box body. Through the arrangement of the first control valve, it is possible to control the liquid to enter the box body or stop entering the box body. In the embodiment of the present application, by uniformly arranging pressure relief holes on the first pressure relief component, when the first control valve changes from the open state to the closed state, the water in the liquid inlet pipe can sequentially enter the first pressure relief cavity through the liquid inlet pipe and the pressure relief holes (at this time, the movable member closes the first pressure relief cavity and the second pressure relief cavity), thereby performing primary pressure relief on the liquid inlet pipe, avoiding excessive pressure in the liquid inlet pipe and damaging the liquid inlet pipe, and thus playing a protective role for the liquid inlet pipe; when the pressure in the liquid inlet pipe exceeds the preset value, the liquid in the liquid inlet pipe enters the first pressure relief cavity through the liquid inlet pipe and the pressure relief holes to perform primary pressure relief on the liquid inlet pipe. The liquid pressure in the first pressure relief cavity increases to push the movable member to move away from the first pressure relief cavity, so that the first pressure relief cavity and the second pressure relief cavity are communicated. At this time, the liquid flowing into the first pressure relief cavity from the liquid inlet pipe can flow into the box body through the second pressure relief cavity, performing secondary pressure relief on the liquid inlet pipe to avoid excessive pressure in the liquid inlet pipe and damaging the liquid inlet pipe, and thus playing a protective role for the liquid inlet pipe. Through the arrangement of the embodiment of the present application, a water tank is provided that can relieve the pressure in the liquid inlet pipe, avoid excessive pressure in the liquid inlet pipe, and play a protective role for the liquid inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings described herein are used to provide a further understanding of the present utility model and form a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present application and do not constitute an improper limitation to the present utility model. In the drawings:

[0022] Figure 1 is a schematic structural diagram of a water tank provided by an embodiment of the present application;

[0023] Figure 2 is Figure 1 a structural cross-sectional view of the pressure relief valve in

[0024] Description of reference numerals:

[0025] 100 - box body; 200 - liquid inlet pipe; 300 - pressure relief pipe; 400 - float valve; 500 - liquid storage part;

[0026] 210 - first control valve; 220 - first maintenance valve;

[0027] 310 - pressure relief valve; 311 - first pressure relief component; 311a - pressure relief hole; 312 - second pressure relief component; 312a - movable block; 312b - elastic member; 313 - first pressure relief cavity; 314 - second pressure relief cavity; 320 - second maintenance valve;

[0028] 510 - liquid storage cavity; 520 - first connecting pipe; 521 - second control valve; 530 - second connecting pipe; 531 - third control valve;

[0029] 11 - first preset liquid level; 12 - second preset liquid level; 13 - third preset liquid level; 14 - fourth preset liquid level. Detailed implementation manners

[0030] In order to enable those skilled in the art of the present technology to better understand the technical solutions in the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0031] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific implementation manners disclosed below.

[0032] In a water supply and drainage system, to meet the need of domestic water use, a water tank or a water pool for domestic water is configured. Usually, a liquid inlet pipe provided with a control valve is used to introduce water into the water tank or the water pool so that the water tank or the water pool reaches the required liquid level.

[0033] In the related art, when the water flow velocity in the liquid inlet pipe is relatively high, it will cause excessive pressure in the liquid inlet pipe, and thus it is very easy to generate a water hammer effect.

[0034] However, the generation of the water hammer effect will cause the pressure borne by the liquid inlet pipe to greatly exceed the designed pressure resistance level, and further cause the leakage of the liquid inlet pipe interface or even the bursting of the liquid inlet pipe.

[0035] The embodiment of the present application provides a water tank to solve the technical problem in the related art that when the water flow velocity in the liquid inlet pipe is too high, a water hammer effect is generated, resulting in the pressure borne by the liquid inlet pipe greatly exceeding the designed pressure resistance level, and further causing the leakage of the liquid inlet pipe interface or even the bursting of the liquid inlet pipe.

[0036] Figure 1 FIG. is a schematic structural diagram of a water tank provided by an embodiment of the present application;

[0037] Figure 2 is Figure 1 a structural cross-sectional view of the pressure relief valve in FIG.

[0038] Referring to Figure 1 and Figure 2 The embodiment of the present application provides a water tank, including: a box body 100, a liquid inlet pipe 200, a first control valve 210, a pressure relief pipe 300 and a pressure relief valve 310;

[0039] The liquid inlet pipe 200 is communicated with the box body 100, and the liquid inlet pipe 200 is configured to introduce liquid into the box body 100;

[0040] The first control valve 210 is arranged on the liquid inlet pipe 200, and the first control valve 210 has a closed state to control the liquid in the liquid inlet pipe 200 to stop flowing into the box body 100;

[0041] One end of the pressure relief pipe 300 is communicated with the liquid inlet pipe 200, and the other end of the pressure relief pipe 300 is communicated with the box body 100;

[0042] The pressure relief valve 310 is arranged on the pressure relief pipe 300, and the pressure relief valve 310 includes a first pressure relief component 311 and a second pressure relief component 312, and a first pressure relief cavity 313 is formed between the first pressure relief component 311 and the second pressure relief component 312;

[0043] A plurality of pressure relief holes 311a are uniformly arranged on the first pressure relief component 311, and the plurality of pressure relief holes 311a communicate the liquid inlet pipe 200 and the first pressure relief cavity 313;

[0044] The second pressure relief component 312 forms a second pressure relief cavity 314, and a movable member is disposed in the second pressure relief cavity 314. The movable member is configured to reciprocate in the second pressure relief cavity 314 along the liquid flow direction to close or communicate the first pressure relief cavity 313 and the second pressure relief cavity 314;

[0045] When the first control valve 210 is in the closed state, the liquid in the liquid inlet pipe 200 can sequentially enter the box body 100 through the first pressure relief cavity 313 and the second pressure relief cavity 314 to reduce the pressure in the liquid inlet pipe 200.

[0046] It should be noted that in the embodiment of the present application, the water hammer effect refers to the inside of the liquid inlet pipe 200, where the inner wall of the liquid inlet pipe 200 is smooth and the liquid flows freely. When the opened first control valve 210 suddenly changes from the open state to the closed state, the liquid flow will generate a pressure on the first control valve 210 and the pipe wall of the liquid inlet pipe 200. Due to the smooth pipe wall of the liquid inlet pipe 200, the subsequent liquid reaches the maximum rapidly under the action of inertia and generates a destructive effect. This is the "water hammer effect" in hydraulics, that is, the positive water hammer.

[0047] Exemplarily, the first control valve 210 can be set as a common valve such as a shut-off valve or a regulating valve, as long as it can control the liquid in the liquid inlet pipe 200 to enter the box body 100 or stop entering the box body 100.

[0048] In a specific implementation, one end of the pressure relief pipe 300 can be communicated with the first connection position of the liquid inlet pipe 200, and the other end of the pressure relief pipe 300 is communicated with the second connection position of the liquid inlet pipe 200. Wherein, the first control valve 210 is disposed between the first connection position and the second connection position of the liquid inlet pipe 200.

[0049] Exemplarily, the first pressure relief component 311 is a baffle in the pressure relief valve 310. A plurality of pressure relief holes 311a are uniformly arranged on the surface of the baffle. The plurality of pressure relief holes 311a can be arranged in a rectangular array on the surface of the baffle, or can be arranged in a ring on the surface of the baffle. No specific limitation is made in the embodiment of the present application.

[0050] Exemplarily, the movable member can be set as a rubber plug. Wherein, the inner diameter of the second pressure relief cavity 314 is larger than the inner diameter of the rubber plug.

[0051] An embodiment of the present application provides a water tank. In the present application, through the setting of the liquid inlet pipe 200, liquid can be introduced into the box body 100. Through the setting of the first control valve 210, it is possible to control the liquid to enter the box body 100 or stop entering the box body 100. In the embodiment of the present application, pressure relief holes 311a are uniformly arranged on the first pressure relief component 311. When the first control valve 210 changes from the open state to the closed state, the water in the liquid inlet pipe 200 can sequentially enter the first pressure relief cavity 313 through the liquid inlet pipe 200 and the pressure relief holes 311a (at this time, the moving part closes the first pressure relief cavity 313 and the second pressure relief cavity 314), thereby performing primary pressure relief on the liquid inlet pipe 200, avoiding excessive pressure in the liquid inlet pipe 200 and causing damage to the liquid inlet pipe 200, thus playing a protective role for the liquid inlet pipe 200; when the pressure in the liquid inlet pipe 200 exceeds the preset value, the liquid in the liquid inlet pipe 200 enters the first pressure relief cavity 313 through the liquid inlet pipe 200 and the pressure relief holes 311a to perform primary pressure relief on the liquid inlet pipe 200. The liquid pressure in the first pressure relief cavity 313 increases to push the moving part to move away from the first pressure relief cavity 313, so that the first pressure relief cavity 313 and the second pressure relief cavity 314 communicate. At this time, the liquid flowing from the liquid inlet pipe 200 into the first pressure relief cavity 313 can flow into the box body 100 through the second pressure relief cavity 314, performing secondary pressure relief on the liquid inlet pipe 200 to avoid excessive pressure in the liquid inlet pipe 200 and causing damage to the liquid inlet pipe 200, thus playing a protective role for the liquid inlet pipe 200. Through the setting of the embodiment of the present application, a water tank is provided that can relieve the pressure in the liquid inlet pipe 200, avoid excessive pressure in the liquid inlet pipe 200, and play a protective role for the liquid inlet pipe 200.

[0052] In some examples, the moving part includes a moving block 312a and an elastic member 312b. One end of the elastic member 312b is arranged at one end of the moving block 312a, and the other end of the elastic member 312b is arranged at the end wall of the second pressure relief cavity 314 facing away from the first pressure relief cavity 313.

[0053] Exemplarily, the moving block 312a can be set as a wooden block, and the elastic member 312b can be set as a spring. Of course, the moving block 312a can also be set as a metal block, and the elastic member 312b can also be set as an elastic member 312b such as rubber.

[0054] In the embodiment of the present application, through the arrangement of the movable block 312a and the elastic member 312b, with one end of the elastic member 312b arranged at one end of the movable block 312a and the other end of the elastic member 312b arranged at the end wall of the second pressure relief chamber 314 facing away from the first pressure relief chamber 313, when the pressure in the liquid inlet pipe 200 exceeds the preset value, the liquid in the liquid inlet pipe 200 can push the movable block 312a and the elastic member 312b through the first pressure relief chamber 313, so that the first pressure relief chamber 313 and the second pressure relief chamber 314 are communicated, and then the liquid in the first pressure relief chamber 313 flows into the second pressure relief chamber 314 and flows into the box body 100 from the second pressure relief chamber 314, thereby playing a role in relieving the pressure of the liquid inlet pipe 200, avoiding damage to the pressure relief pipe 300 caused by excessive pressure in the liquid inlet pipe 200, and thus playing a protective role for the pressure relief pipe 300.

[0055] In some examples, the inner diameter of the second pressure relief chamber 314 gradually increases from the direction of the first pressure relief chamber 313 to the direction of the second pressure relief chamber 314.

[0056] In specific implementation, the inner diameter of the second pressure relief chamber 314 is set to be cylindrical, the movable block 312a is set to be conical, and the inner diameter of the movable block 312a gradually decreases from the direction of the first pressure relief chamber 313 to the direction of the second pressure relief chamber 314.

[0057] In the embodiment of the present application, by gradually decreasing the inner diameter of the second pressure relief chamber 314 from the direction of the first pressure relief chamber 313 to the direction of the second pressure relief chamber 314, when the pressure in the liquid inlet pipe 200 exceeds the preset value, the liquid in the first pressure relief chamber 313 flows into the second pressure relief chamber 314 and pushes the movable member, so that the movable member moves from the direction of the first pressure relief chamber 313 to the direction of the second pressure relief chamber 314, and the flow area of the liquid in the second pressure relief chamber 314 gradually increases, thereby gradually reducing the pressure in the liquid inlet pipe 200 and avoiding an instantaneous decrease in the pressure in the liquid inlet pipe 200, which causes the liquid to impact the pipe wall and generate a large noise, and further being able to reduce the noise.

[0058] In some other implementation manners, the water tank further includes a float valve 400, and the float valve 400 is arranged in the box body 100.

[0059] In specific implementation, the float valve 400 is connected to the valve core of the first control valve 210 through a connecting rod. When the float valve 400 drops to the first preset liquid level 11 in the box body 100, the connecting rod drives the valve core to move downward to open the first control valve 210, so that the first control valve is in an open state; when the float valve 400 rises to the second preset liquid level 12 in the box body 100, the connecting rod drives the valve core to move upward to close the first control valve 210, so that the first control valve 210 is in a closed state.

[0060] In specific implementation, the liquid level in the box body 100 includes the lowest liquid level, the highest liquid level, and the overflow liquid level. In the embodiment of the present application, the first preset liquid level 11 is the lowest liquid level, the second preset liquid level 12 is the highest liquid level, and the third preset liquid level 13 is the overflow liquid level.

[0061] When the liquid level in the box body 100 rises to the second preset liquid level 12, the float valve 400 controls the valve core of the first control valve 210 to move upward through the connecting rod to close the first control valve 210. At this time, a transient flow is generated in the liquid inlet pipe 200 and propagates in the closed pipeline in the form of a pressure wave. The water hammer action mechanism generated is similar to that of the fire pump when it stops pumping.

[0062] Therefore, referring to the "Technical Code for Fire Protection Water Supply and Fire Hydrant Systems" GB50974-2014 version, see Formula (1) and Formula (2) to calculate the water hammer pressure. It should be further explained that taking the water conveyed by the liquid inlet pipe 200 into the box body 100 as an example:

[0063] ΔP = ρcv (1)

[0065]

[0066] In the formula: ΔP - the maximum water hammer pressure (Pa);

[0067] ρ - the density of water (kg / m3);

[0068] c - the propagation speed of the water hammer wave (m / s);

[0069] v - the water flow velocity in the liquid inlet pipe 200 (m / s);

[0070] C 0 - the propagation speed of sound waves in water, taking 1435 m / s;

[0071] K - the bulk modulus of elasticity of water, taking K = 2.1×10 9 Pa;

[0072] E - the modulus of elasticity of the material of the liquid inlet pipe 200, for steel pipe E = 20.6×10 10 Pa, for cast iron pipe E = 9.8

[0073] ×10 10 Pa, for steel wire mesh skeleton plastic (PE) composite pipe E = 6.5×10 10 Pa;

[0074] d i - the nominal diameter of the liquid inlet pipe 200 (mm);

[0075] δ - the wall thickness of the liquid inlet pipe 200 (mm).

[0076] In a conventional civil building, when the liquid inlet pipe 200 uses a steel-plastic composite pipe with a diameter of 100 mm, the pipe wall thickness is taken as 3.2 mm and the water flow velocity is taken as 1.5 m / s. If the water hammer effect is not considered, the calculated water hammer pressure is 1.54 MPa, which is much greater than the nominal pressure of 0.60 MPa commonly selected for municipal pipelines. When the water hammer effect occurs, this pressure will continuously act on the weak parts of the pipeline, damaging the pipeline and its fittings, and will also affect the water supply stability in the direct supply area in the form of pressure waves.

[0077] In this application, the preset value can be set to 0.60 MPa. Of course, in specific implementation, the preset value can be set according to the actual situation, and the pressure when the movable part closes and communicates the first pressure relief chamber 313 and the second pressure relief chamber 314 can be set according to the preset value.

[0078] Exemplarily, when the liquid level in the box body 100 is less than or equal to the lowest liquid level, the first control valve 210 is in an open state, and the liquid inlet pipe 200 feeds liquid into the box body 100. When the liquid level in the box body 100 is greater than or equal to the highest liquid level, the first control valve 210 changes from the open state to the closed state.

[0079] Through the setting of the float valve 400 in the embodiment of this application, the liquid level in the box body 100 can be monitored in real time. And in the embodiment of this application, the float valve 400 is connected to the valve core of the first control valve 210 through a connecting rod, which can enable the liquid inlet pipe 200 to feed liquid into the box body 100 according to the liquid level situation in the box body 100, thereby improving the intelligence of the water tank function.

[0080] In some other examples, the water tank further includes a first maintenance valve 220 and a second maintenance valve 320. The first maintenance valve 220 is arranged on the liquid inlet pipe 200, and the second maintenance valve 320 is arranged on the pressure relief pipe 300.

[0081] It should be noted that the maintenance valve, also known as the flap valve, is a kind of on-off valve specifically used in industrial pipelines. The maintenance valve is usually arranged in the horizontal or vertical direction of the pipeline, aiming to enable people to perform maintenance and repair when the pipeline is in working condition, or to prevent medium leakage when new pipelines are connected (such as installing valves).

[0082] Through the setting of the first maintenance valve 220 in the embodiment of this application, it is convenient for workers to maintain and repair the liquid inlet pipe 200. Through the setting of the second maintenance valve 320 in the embodiment of this application, it is convenient for workers to maintain and repair the pressure relief pipe 300.

[0083] In some examples, the water tank further includes a liquid storage part 500. A liquid storage cavity 510 is formed in the liquid storage part 500. The liquid storage cavity 510 communicates with the pressure relief pipe 300 through a first connecting pipe 520, and the liquid storage cavity 510 communicates with the box body 100 through a second connecting pipe 530. Among them, the first connecting pipe 520 is arranged between the connecting end of the pressure relief pipe 300 and the liquid inlet pipe 200 and the liquid inlet end of the pressure relief valve 310.

[0084] Exemplarily, a second control valve 521 is arranged on the first connecting pipe 520. The second control valve 521 is used to control the liquid in the pressure relief pipe 300 to flow into the liquid storage cavity 510.

[0085] A third control valve 531 is arranged on the second connecting pipe 530. The third control valve 531 is used to control the liquid in the liquid storage cavity 510 to flow into the box body 100 through the second connecting pipe 530.

[0086] In specific implementation, a fourth preset liquid level 14 is further arranged in the box body 100. The fourth preset liquid level 14 is arranged between the third preset liquid level 13 and the second preset liquid level 12. When the liquid level in the box body 100 reaches the fourth preset liquid level 14, the second control valve 521 is opened, so that part of the liquid in the liquid inlet pipe 200 flows into the liquid storage cavity 510 for storage. When the liquid level in the box body 100 is lower than the second preset liquid level 12, the third control valve 531 is opened, so that the liquid in the liquid storage cavity 510 flows into the box body 100.

[0087] Through the liquid storage part 500 and the settings of the second control valve 521 and the third control valve 531 in the embodiments of the present application, part of the liquid in the liquid inlet pipe 200 can be dispersed, and the liquid level in the box body 100 can be prevented from reaching the overflow liquid level.

[0088] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application on the basis of several embodiments provided by the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.

[0089] The above specific implementation manners further elaborate the purpose, technical solution and beneficial effects of the embodiments of the present application. It should be understood that the above are only the specific implementation manners of the embodiments of the present application, and are not used to limit the protection scope of the embodiments of the present application. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A water tank, characterized in that: include: Box body, liquid inlet pipe, first control valve, pressure relief pipe and pressure relief valve; The liquid inlet pipe is in communication with the box, and the liquid inlet pipe is configured to introduce liquid into the box; The first control valve is arranged on the liquid inlet pipe, and the first control valve has a closed state to control the liquid in the liquid inlet pipe to stop flowing into the box body; One end of the pressure relief pipe is connected to the liquid inlet pipe, and the other end of the pressure relief pipe is connected to the box body; The pressure relief valve is arranged on the pressure relief pipe, and the pressure relief valve comprises a first pressure relief component and a second pressure relief component, and a first pressure relief chamber is formed between the first pressure relief component and the second pressure relief component; The first pressure relief component is evenly provided with a plurality of pressure relief holes, and the plurality of pressure relief holes are connected with the liquid inlet pipe and the first pressure relief chamber; The second pressure relief assembly is formed with a second pressure relief chamber, a movable member is disposed in the second pressure relief chamber, and the movable member is configured to reciprocate in the second pressure relief chamber along the liquid flow direction to close or connect the first pressure relief chamber and the second pressure relief chamber; When the first control valve is in a closed state, the liquid in the liquid inlet pipe can enter the box body through the first pressure relief chamber and the second pressure relief chamber in sequence to reduce the pressure in the liquid inlet pipe.

2. A water tank according to claim 1, characterized in that: The movable member includes a movable block and an elastic member, one end of the elastic member is arranged at one end of the movable block, and the other end of the elastic member is arranged at an end wall of the second pressure relief chamber facing away from the first pressure relief chamber.

3. A water tank according to claim 2, characterized in that: The inner diameter of the second pressure relief chamber gradually increases from the direction of the first pressure relief chamber to the direction of the second pressure relief chamber.

4. A water tank according to any one of claims 1 to 3, characterized in that: The water tank further comprises a first inspection valve and a second inspection valve, wherein the first inspection valve is arranged on the liquid inlet pipe, and the second inspection valve is arranged on the pressure relief pipe.

5. A water tank according to any one of claims 1 to 3, characterized in that: The water tank also includes a liquid storage portion, which forms a liquid storage cavity, the liquid storage cavity is connected to the pressure relief pipe through a first connecting pipe, and the liquid storage cavity is connected to the box body through a second connecting pipe; wherein the first connecting pipe is arranged between the connecting end of the pressure relief pipe and the liquid inlet pipe and the liquid inlet end of the pressure relief valve.

6. A water tank according to claim 5, characterized in that: The first connecting pipe is provided with a second control valve, and the second control valve is used to control the liquid in the pressure relief pipe to flow into the liquid storage chamber; The second connecting pipe is provided with a third control valve, and the third control valve is used to control the liquid in the liquid storage chamber to flow into the box body through the second connecting pipe.

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